Special exhibit devoted to former First Lady Pat Nixon (16 images)

Patricia Nixon Cox speaks at the opening of a special exhibit devoted to her mother the former First Lady Pat Nixon, on display at the Nixon Presidential Library in Yorba Linda, California on March 16, 2012. UPI/Phil McCarten

Julie Nixon Eisenhower views dresses worn by her mother during a tour of a special exhibit devoted to the former First Lady Pat Nixon on display at the Nixon Presidential Library in Yorba Linda, California on March 16, 2012. UPI/Phil McCarten

In honor of what would have been the late Pat Nixon's 100th birthday, a special exhibit devoted to the former First Lady is on display, including love letters written to her by her husband, ex-President Richard Nixon, at the Nixon Presidential Library in Yorba Linda, California on March 16, 2012. UPI/Phil McCarten

Julie Nixon Eisenhower speaks at the opening of a special exhibit devoted to her mother the former First Lady Pat Nixon, on display at the Nixon Presidential Library in Yorba Linda, California on March 16, 2012. UPI/Phil McCarten